Mercurial > templog
annotate main.c @ 324:e3664732f11f
Add INT0 button
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Tue, 22 May 2012 21:27:50 +0800 |
| parents | df7384336798 |
| children | f1016b151689 |
| rev | line source |
|---|---|
| 306 | 1 /* Name: main.c |
| 2 * Author: <insert your name here> | |
| 3 * Copyright: <insert your copyright message here> | |
| 4 * License: <insert your license reference here> | |
| 5 */ | |
| 6 | |
| 7 #include <stdio.h> | |
| 8 #include <string.h> | |
| 319 | 9 #include <stddef.h> |
| 307 | 10 #include <avr/io.h> |
| 11 #include <avr/interrupt.h> | |
| 12 #include <avr/sleep.h> | |
| 313 | 13 #include <util/delay.h> |
| 312 | 14 #include <avr/pgmspace.h> |
| 319 | 15 #include <avr/eeprom.h> |
| 306 | 16 #include <util/crc16.h> |
| 17 | |
| 318 | 18 // for DWORD of get_fattime() |
| 309 | 19 #include "integer.h" |
| 318 | 20 |
| 21 #include "simple_ds18b20.h" | |
| 319 | 22 #include "onewire.h" |
| 309 | 23 |
| 306 | 24 // configuration params |
| 25 // - measurement interval | |
| 26 // - transmit interval | |
| 27 // - bluetooth params | |
| 28 // - number of sensors (and range?) | |
| 29 | |
| 307 | 30 // 1 second. we have 1024 prescaler, 32768 crystal. |
| 308 | 31 #define SLEEP_COMPARE 32 |
| 320 | 32 #define MEASURE_WAKE 10 |
|
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33 |
| 319 | 34 #define VALUE_NOSENSOR -9000 |
| 35 #define VALUE_BROKEN -8000 | |
| 36 | |
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37 #define COMMS_WAKE 3600 |
| 308 | 38 |
| 316 | 39 #define BAUD 19200 |
| 313 | 40 #define UBRR ((F_CPU)/8/(BAUD)-1) |
| 41 | |
| 42 #define PORT_LED PORTC | |
| 43 #define DDR_LED DDRC | |
| 44 #define PIN_LED PC4 | |
| 307 | 45 |
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46 #define PORT_SHDN PORTD |
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47 #define DDR_SHDN DDRD |
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48 #define PIN_SHDN PD7 |
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49 |
| 319 | 50 #define NUM_MEASUREMENTS 100 |
| 51 #define MAX_SENSORS 5 | |
| 312 | 52 |
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53 // fixed at 8, have a shorter name |
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54 #define ID_LEN OW_ROMCODE_SIZE |
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55 |
| 316 | 56 int uart_putchar(char c, FILE *stream); |
| 320 | 57 static void long_delay(int ms); |
| 58 | |
| 306 | 59 static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL, |
| 60 _FDEV_SETUP_WRITE); | |
| 61 | |
| 319 | 62 static uint16_t n_measurements = 0; |
| 63 // stored as decidegrees | |
| 320 | 64 static int16_t measurements[NUM_MEASUREMENTS][MAX_SENSORS]; |
| 306 | 65 |
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66 // boolean flags |
| 313 | 67 static uint8_t need_measurement = 0; |
| 68 static uint8_t need_comms = 0; | |
| 69 static uint8_t comms_done = 0; | |
| 307 | 70 |
| 313 | 71 static uint8_t readpos = 0; |
| 306 | 72 static char readbuf[30]; |
| 73 | |
| 313 | 74 static uint8_t measure_count = 0; |
| 75 static uint16_t comms_count = 0; | |
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76 |
| 319 | 77 // thanks to http://projectgus.com/2010/07/eeprom-access-with-arduino/ |
| 78 #define eeprom_read_to(dst_p, eeprom_field, dst_size) eeprom_read_block((dst_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (dst_size)) | |
| 79 #define eeprom_read(dst, eeprom_field) eeprom_read_to((&dst), eeprom_field, sizeof(dst)) | |
| 80 #define eeprom_write_from(src_p, eeprom_field, src_size) eeprom_write_block((src_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (src_size)) | |
| 81 #define eeprom_write(src, eeprom_field) { eeprom_write_from(&src, eeprom_field, sizeof(src)); } | |
| 82 | |
| 83 #define EXPECT_MAGIC 0x67c9 | |
| 84 | |
| 85 struct __attribute__ ((__packed__)) __eeprom_data { | |
| 86 uint16_t magic; | |
| 87 uint8_t n_sensors; | |
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88 uint8_t sensor_id[MAX_SENSORS][ID_LEN]; |
| 319 | 89 }; |
| 90 | |
| 314 | 91 #define DEBUG(str) printf_P(PSTR(str)) |
| 92 | |
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93 static void deep_sleep(); |
| 307 | 94 |
| 324 | 95 static void |
| 96 chip_setup() | |
| 97 { | |
| 98 // INT0 setup | |
| 99 EIMSK = _BV(INT0); | |
| 100 // set pullup | |
| 101 PORTD |= _BV(PD2); | |
| 102 } | |
| 103 | |
| 104 | |
| 306 | 105 static void |
| 313 | 106 uart_on() |
| 306 | 107 { |
| 314 | 108 // Power reduction register |
| 109 //PRR &= ~_BV(PRUSART0); | |
| 110 | |
| 306 | 111 // baud rate |
| 313 | 112 UBRR0H = (unsigned char)(UBRR >> 8); |
| 113 UBRR0L = (unsigned char)UBRR; | |
| 114 // set 2x clock, improves accuracy of UBRR | |
| 115 UCSR0A |= _BV(U2X0); | |
| 312 | 116 UCSR0B = _BV(RXCIE0) | _BV(RXEN0) | _BV(TXEN0); |
| 306 | 117 //8N1 |
| 313 | 118 UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); |
| 312 | 119 } |
| 120 | |
| 121 static void | |
| 122 uart_off() | |
| 123 { | |
| 124 // Turn of interrupts and disable tx/rx | |
| 125 UCSR0B = 0; | |
| 126 | |
| 127 // Power reduction register | |
| 314 | 128 //PRR |= _BV(PRUSART0); |
| 306 | 129 } |
| 130 | |
| 316 | 131 int |
| 306 | 132 uart_putchar(char c, FILE *stream) |
| 133 { | |
| 316 | 134 // XXX should sleep in the loop for power. |
| 314 | 135 if (c == '\n') |
| 136 { | |
| 316 | 137 loop_until_bit_is_set(UCSR0A, UDRE0); |
| 138 UDR0 = '\r';; | |
| 314 | 139 } |
| 308 | 140 loop_until_bit_is_set(UCSR0A, UDRE0); |
| 141 UDR0 = c; | |
| 316 | 142 if (c == '\r') |
| 143 { | |
| 144 loop_until_bit_is_set(UCSR0A, UDRE0); | |
| 145 UDR0 = '\n';; | |
| 146 } | |
| 306 | 147 return 0; |
| 148 } | |
| 149 | |
| 150 static void | |
| 151 cmd_fetch() | |
| 152 { | |
| 153 uint16_t crc = 0; | |
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154 uint8_t n_sensors; |
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155 eeprom_read(n_sensors, n_sensors); |
| 319 | 156 |
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157 printf_P(PSTR("%d sensors\n"), n_measurements); |
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158 for (uint8_t s = 0; s < n_sensors; s++) |
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159 { |
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160 uint8_t id[ID_LEN]; |
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161 printf_P(PSTR("%d : "), s); |
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162 eeprom_read_to(id, sensor_id[s], ID_LEN); |
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163 printhex(id, ID_LEN); |
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164 putchar('\n'); |
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165 for (uint8_t i = 0; i < ID_LEN; i++) |
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166 { |
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167 crc = _crc_ccitt_update(crc, id[i]); |
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168 } |
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169 } |
| 312 | 170 printf_P(PSTR("%d measurements\n"), n_measurements); |
| 320 | 171 for (uint16_t n = 0; n < n_measurements; n++) |
| 306 | 172 { |
| 320 | 173 printf_P(PSTR("%3d :"), n); |
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174 for (uint8_t s = 0; s < n_sensors; s++) |
| 319 | 175 { |
| 320 | 176 printf_P(PSTR(" %6d"), measurements[n][s]); |
| 177 crc = _crc_ccitt_update(crc, measurements[n][s]); | |
| 319 | 178 } |
| 179 putchar('\n'); | |
| 306 | 180 } |
| 312 | 181 printf_P(PSTR("CRC : %d\n"), crc); |
| 306 | 182 } |
| 183 | |
| 184 static void | |
| 185 cmd_clear() | |
| 186 { | |
| 313 | 187 n_measurements = 0; |
| 188 printf_P(PSTR("Cleared\n")); | |
| 306 | 189 } |
| 190 | |
| 191 static void | |
| 192 cmd_btoff() | |
| 193 { | |
| 313 | 194 printf_P(PSTR("Turning off\n")); |
| 195 _delay_ms(50); | |
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196 PORTD |= _BV(PIN_SHDN); |
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197 comms_done = 1; |
| 306 | 198 } |
| 199 | |
| 200 static void | |
| 318 | 201 cmd_measure() |
| 202 { | |
| 203 printf_P(PSTR("Measuring\n")); | |
| 204 need_measurement = 1; | |
| 205 } | |
| 206 | |
| 207 static void | |
| 208 cmd_sensors() | |
| 209 { | |
| 210 uint8_t ret = simple_ds18b20_start_meas(NULL); | |
| 320 | 211 printf_P(PSTR("All sensors, ret %d, waiting...\n"), ret); |
| 212 long_delay(DS18B20_TCONV_12BIT); | |
| 318 | 213 simple_ds18b20_read_all(); |
| 214 } | |
| 215 | |
| 319 | 216 // 0 on success |
| 217 static uint8_t | |
| 218 get_hex_string(const char *hex, uint8_t *out, uint8_t size) | |
| 219 { | |
| 220 uint8_t upper; | |
| 221 uint8_t o; | |
| 222 for (uint8_t i = 0, z = 0; o < size; i++) | |
| 223 { | |
| 224 uint8_t h = hex[i]; | |
| 225 if (h >= 'A' && h <= 'F') | |
| 226 { | |
| 227 // lower case | |
| 228 h += 0x20; | |
| 229 } | |
| 230 uint8_t nibble; | |
| 231 if (h >= '0' && h <= '9') | |
| 232 { | |
| 233 nibble = h - '0'; | |
| 234 } | |
| 235 else if (h >= 'a' && h <= 'f') | |
| 236 { | |
| 237 nibble = 10 + h - 'a'; | |
| 238 } | |
| 239 else if (h == ' ' || h == ':') | |
| 240 { | |
| 241 continue; | |
| 242 } | |
| 243 else | |
| 244 { | |
| 245 printf_P(PSTR("Bad hex 0x%x '%c'\n"), hex[i], hex[i]); | |
| 246 return 1; | |
| 247 } | |
| 248 | |
| 249 if (z % 2 == 0) | |
| 250 { | |
| 251 upper = nibble << 4; | |
| 252 } | |
| 253 else | |
| 254 { | |
| 255 out[o] = upper | nibble; | |
| 256 o++; | |
| 257 } | |
| 258 | |
| 259 z++; | |
| 260 } | |
| 261 | |
| 262 if (o != size) | |
| 263 { | |
| 264 printf_P(PSTR("Short hex\n")); | |
| 265 return 1; | |
| 266 } | |
| 267 return 0; | |
| 268 } | |
| 269 | |
| 270 static void | |
| 271 add_sensor(uint8_t *id) | |
| 272 { | |
| 273 uint8_t n; | |
| 274 eeprom_read(n, n_sensors); | |
| 275 if (n < MAX_SENSORS) | |
| 276 { | |
| 277 cli(); | |
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278 eeprom_write_from(id, sensor_id[n], ID_LEN); |
| 319 | 279 n++; |
| 280 eeprom_write(n, n_sensors); | |
| 281 sei(); | |
| 282 printf_P(PSTR("Added sensor %d : "), n); | |
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283 printhex(id, ID_LEN); |
| 319 | 284 putchar('\n'); |
| 285 } | |
| 286 else | |
| 287 { | |
| 288 printf_P(PSTR("Too many sensors\n")); | |
| 289 } | |
| 290 } | |
| 291 | |
| 292 static void | |
| 293 cmd_add_all() | |
| 294 { | |
| 295 uint8_t id[OW_ROMCODE_SIZE]; | |
| 296 printf_P("Adding all\n"); | |
| 297 ow_reset(); | |
| 298 for( uint8_t diff = OW_SEARCH_FIRST; diff != OW_LAST_DEVICE; ) | |
| 299 { | |
| 300 diff = ow_rom_search( diff, &id[0] ); | |
| 301 if( diff == OW_PRESENCE_ERR ) { | |
| 302 printf_P( PSTR("No Sensor found\r") ); | |
| 303 return; | |
| 304 } | |
| 305 | |
| 306 if( diff == OW_DATA_ERR ) { | |
| 307 printf_P( PSTR("Bus Error\r") ); | |
| 308 return; | |
| 309 } | |
| 310 add_sensor(id); | |
| 311 } | |
| 312 } | |
| 313 | |
| 314 static void | |
| 315 cmd_add_sensor(const char* hex_addr) | |
| 316 { | |
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317 uint8_t id[ID_LEN]; |
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318 uint8_t ret = get_hex_string(hex_addr, id, ID_LEN); |
| 319 | 319 if (ret) |
| 320 { | |
| 321 return; | |
| 322 } | |
| 323 add_sensor(id); | |
| 324 | |
| 325 } | |
| 326 | |
| 327 static void | |
| 328 cmd_init() | |
| 329 { | |
| 330 printf_P(PSTR("Resetting sensor list\n")); | |
| 331 uint8_t zero = 0; | |
| 332 cli(); | |
| 333 eeprom_write(zero, n_sensors); | |
| 334 sei(); | |
| 335 printf_P(PSTR("Done.\n")); | |
| 336 } | |
| 337 | |
| 338 static void | |
| 339 check_first_startup() | |
| 340 { | |
| 341 uint16_t magic; | |
| 342 eeprom_read(magic, magic); | |
| 343 if (magic != EXPECT_MAGIC) | |
| 344 { | |
| 345 printf_P(PSTR("First boot, looking for sensors...\n")); | |
| 346 cmd_init(); | |
| 347 cmd_add_all(); | |
| 320 | 348 cli(); |
| 349 magic = EXPECT_MAGIC; | |
| 350 eeprom_write(magic, magic); | |
| 351 sei(); | |
| 319 | 352 } |
| 353 } | |
| 354 | |
| 318 | 355 static void |
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356 cmd_toggle() |
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357 { |
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358 PORT_SHDN ^= _BV(PIN_SHDN); |
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359 printf_P(PSTR("toggling power 3.3v %d\n"), PORT_SHDN & _BV(PIN_SHDN)); |
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360 } |
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361 |
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362 static void |
| 306 | 363 read_handler() |
| 364 { | |
| 312 | 365 if (strcmp_P(readbuf, PSTR("fetch")) == 0) |
| 306 | 366 { |
| 367 cmd_fetch(); | |
| 368 } | |
| 312 | 369 else if (strcmp_P(readbuf, PSTR("clear")) == 0) |
| 306 | 370 { |
| 371 cmd_clear(); | |
| 372 } | |
| 312 | 373 else if (strcmp_P(readbuf, PSTR("btoff")) == 0) |
| 306 | 374 { |
| 375 cmd_btoff(); | |
| 376 } | |
| 318 | 377 else if (strcmp_P(readbuf, PSTR("measure")) == 0) |
| 378 { | |
| 379 cmd_measure(); | |
| 380 } | |
| 381 else if (strcmp_P(readbuf, PSTR("sensors")) == 0) | |
| 382 { | |
| 383 cmd_sensors(); | |
| 384 } | |
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385 else if (strcmp_P(readbuf, PSTR("toggle")) == 0) |
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386 { |
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387 cmd_toggle(); |
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388 } |
| 319 | 389 else if (strncmp_P(readbuf, PSTR("adds "), strlen("adds ")) == 0) |
| 390 { | |
| 391 cmd_add_sensor(readbuf + strlen("adds ")); | |
| 392 } | |
| 393 else if (strcmp_P(readbuf, PSTR("addall"))== 0) | |
| 394 { | |
| 395 cmd_add_all(); | |
| 396 } | |
| 397 else if (strcmp_P(readbuf, PSTR("init")) == 0) | |
| 398 { | |
| 399 cmd_init(); | |
| 400 } | |
| 306 | 401 else |
| 402 { | |
| 312 | 403 printf_P(PSTR("Bad command\n")); |
| 306 | 404 } |
| 405 } | |
| 406 | |
| 324 | 407 ISR(INT0_vwct) |
| 408 { | |
| 409 need_comms = 1; | |
| 410 } | |
| 411 | |
| 412 | |
| 308 | 413 ISR(USART_RX_vect) |
| 306 | 414 { |
| 308 | 415 char c = UDR0; |
| 318 | 416 uart_putchar(c, NULL); |
| 417 if (c == '\r') | |
| 306 | 418 { |
| 419 readbuf[readpos] = '\0'; | |
| 420 read_handler(); | |
| 421 readpos = 0; | |
| 422 } | |
| 423 else | |
| 424 { | |
| 425 readbuf[readpos] = c; | |
| 426 readpos++; | |
| 427 if (readpos >= sizeof(readbuf)) | |
| 428 { | |
| 429 readpos = 0; | |
| 430 } | |
| 431 } | |
| 432 } | |
| 433 | |
| 308 | 434 ISR(TIMER2_COMPA_vect) |
| 307 | 435 { |
| 320 | 436 TCNT2 = 0; |
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437 measure_count ++; |
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438 comms_count ++; |
| 318 | 439 printf("measure_count %d\n", measure_count); |
| 320 | 440 if (measure_count >= MEASURE_WAKE) |
| 307 | 441 { |
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442 measure_count = 0; |
| 318 | 443 printf("need_measurement = 1\n"); |
| 307 | 444 need_measurement = 1; |
| 445 } | |
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446 |
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447 if (comms_count == COMMS_WAKE) |
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448 { |
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449 comms_count = 0; |
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450 need_comms = 1; |
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451 } |
| 307 | 452 } |
| 453 | |
| 309 | 454 DWORD get_fattime (void) |
| 455 { | |
| 456 return 0; | |
| 457 } | |
| 458 | |
| 307 | 459 static void |
| 460 deep_sleep() | |
| 461 { | |
| 462 // p119 of manual | |
| 308 | 463 OCR2A = SLEEP_COMPARE; |
| 464 loop_until_bit_is_clear(ASSR, OCR2AUB); | |
| 307 | 465 |
| 466 set_sleep_mode(SLEEP_MODE_PWR_SAVE); | |
| 467 sleep_mode(); | |
| 468 } | |
| 469 | |
| 470 static void | |
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471 idle_sleep() |
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472 { |
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473 set_sleep_mode(SLEEP_MODE_IDLE); |
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474 sleep_mode(); |
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475 } |
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476 |
| 320 | 477 #if 0 |
| 478 // untested | |
| 312 | 479 static void |
| 480 do_adc_335() | |
| 481 { | |
| 314 | 482 //PRR &= ~_BV(PRADC); |
| 312 | 483 |
| 484 ADMUX = _BV(ADLAR); | |
| 485 | |
| 486 // ADPS2 = /16 prescaler, 62khz at 1mhz clock | |
| 487 ADCSRA = _BV(ADEN) | _BV(ADPS2); | |
| 488 | |
| 489 // measure value | |
| 490 ADCSRA |= _BV(ADSC); | |
| 491 loop_until_bit_is_clear(ADCSRA, ADSC); | |
| 492 uint8_t low = ADCL; | |
| 493 uint8_t high = ADCH; | |
| 494 uint16_t f_measure = low + (high << 8); | |
| 495 | |
| 496 // set to measure 1.1 reference | |
| 497 ADMUX = _BV(ADLAR) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1); | |
| 498 ADCSRA |= _BV(ADSC); | |
| 499 loop_until_bit_is_clear(ADCSRA, ADSC); | |
| 500 uint8_t low_11 = ADCL; | |
| 501 uint8_t high_11 = ADCH; | |
| 502 uint16_t f_11 = low_11 + (high_11 << 8); | |
| 503 | |
| 504 float res_volts = 1.1 * f_measure / f_11; | |
| 505 | |
| 506 // 10mV/degree | |
| 507 // scale to 1/5 degree units above 0C | |
| 508 int temp = (res_volts - 2.73) * 500; | |
| 319 | 509 // XXX fixme |
| 510 //measurements[n_measurements] = temp; | |
| 312 | 511 // XXX something if it hits the limit |
| 512 | |
| 513 // measure AVR internal temperature against 1.1 ref. | |
| 514 ADMUX = _BV(ADLAR) | _BV(MUX3) | _BV(REFS1) | _BV(REFS0); | |
| 515 ADCSRA |= _BV(ADSC); | |
| 516 loop_until_bit_is_clear(ADCSRA, ADSC); | |
| 517 uint16_t res_internal = ADCL; | |
| 518 res_internal |= ADCH << 8; | |
| 519 | |
| 520 float internal_volts = res_internal * (1.1 / 1024.0); | |
| 521 | |
| 522 // 1mV/degree | |
| 523 int internal_temp = (internal_volts - 2.73) * 5000; | |
| 319 | 524 // XXX fixme |
| 525 //internal_measurements[n_measurements] = internal_temp; | |
| 312 | 526 |
| 527 printf_P("measure %d: external %d, internal %d, 1.1 %d\n", | |
| 528 n_measurements, temp, internal_temp, f_11); | |
| 529 | |
| 530 n_measurements++; | |
| 314 | 531 //PRR |= _BV(PRADC); |
| 312 | 532 } |
| 320 | 533 #endif |
| 312 | 534 |
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535 static void |
| 307 | 536 do_measurement() |
| 537 { | |
| 319 | 538 uint8_t n_sensors; |
| 320 | 539 printf("do_measurement\n"); |
| 319 | 540 eeprom_read(n_sensors, n_sensors); |
| 320 | 541 printf("do_measurement sensors %d\n", n_sensors); |
| 319 | 542 |
| 543 uint8_t ret = simple_ds18b20_start_meas(NULL); | |
| 320 | 544 printf_P(PSTR("Read all sensors, ret %d, waiting...\n"), ret); |
| 319 | 545 _delay_ms(DS18B20_TCONV_12BIT); |
| 546 | |
| 547 if (n_measurements == NUM_MEASUREMENTS) | |
| 548 { | |
| 320 | 549 printf_P(PSTR("Measurements .overflow\n")); |
| 319 | 550 n_measurements = 0; |
| 551 } | |
| 312 | 552 |
| 320 | 553 for (uint8_t s = 0; s < MAX_SENSORS; s++) |
| 319 | 554 { |
| 555 int16_t decicelsius; | |
| 320 | 556 if (s >= n_sensors) |
| 319 | 557 { |
| 558 decicelsius = VALUE_NOSENSOR; | |
| 559 } | |
| 560 else | |
| 561 { | |
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562 uint8_t id[ID_LEN]; |
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563 eeprom_read_to(id, sensor_id[s], ID_LEN); |
| 319 | 564 |
| 565 uint8_t ret = simple_ds18b20_read_decicelsius(id, &decicelsius); | |
| 566 if (ret != DS18X20_OK) | |
| 567 { | |
| 568 decicelsius = VALUE_BROKEN; | |
| 569 } | |
| 570 } | |
| 320 | 571 measurements[n_measurements][s] = decicelsius; |
| 319 | 572 } |
| 320 | 573 n_measurements++; |
| 318 | 574 //do_adc_335(); |
| 307 | 575 } |
| 576 | |
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577 static void |
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578 do_comms() |
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579 { |
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580 need_comms = 0; |
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581 |
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582 // turn on bluetooth |
| 313 | 583 uart_on(); |
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584 |
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585 // write sd card here? same 3.3v regulator... |
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586 |
| 318 | 587 printf("ready> \n"); |
| 588 | |
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589 comms_done = 0; |
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590 for (;;) |
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591 { |
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592 if (comms_done) |
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593 { |
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594 break; |
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595 } |
| 312 | 596 |
| 597 if (need_measurement) | |
| 598 { | |
| 320 | 599 need_measurement = 0; |
| 600 printf("measure from do_comms\n"); | |
| 312 | 601 do_measurement(); |
| 602 } | |
| 603 | |
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604 idle_sleep(); |
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605 } |
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606 |
| 312 | 607 uart_off(); |
| 608 | |
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609 // turn off bluetooth |
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610 } |
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611 |
| 313 | 612 static void |
| 613 blink() | |
| 614 { | |
| 615 PORT_LED &= ~_BV(PIN_LED); | |
| 315 | 616 _delay_ms(1); |
| 313 | 617 PORT_LED |= _BV(PIN_LED); |
| 618 } | |
| 619 | |
| 620 static void | |
| 621 long_delay(int ms) | |
| 622 { | |
| 623 int iter = ms / 100; | |
| 624 | |
| 625 for (int i = 0; i < iter; i++) | |
| 626 { | |
| 627 _delay_ms(100); | |
| 628 } | |
| 629 } | |
| 630 | |
| 314 | 631 ISR(BADISR_vect) |
| 632 { | |
| 320 | 633 //uart_on(); |
| 314 | 634 printf_P(PSTR("Bad interrupt\n")); |
| 635 } | |
| 636 | |
| 315 | 637 static void |
| 638 set_2mhz() | |
| 639 { | |
| 640 cli(); | |
| 641 CLKPR = _BV(CLKPCE); | |
| 642 // divide by 4 | |
| 643 CLKPR = _BV(CLKPS1); | |
| 644 sei(); | |
| 645 } | |
| 646 | |
| 306 | 647 int main(void) |
| 648 { | |
| 315 | 649 set_2mhz(); |
| 650 | |
| 313 | 651 DDR_LED |= _BV(PIN_LED); |
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652 DDR_SHDN |= _BV(PIN_SHDN); |
| 314 | 653 blink(); |
| 313 | 654 |
| 312 | 655 stdout = &mystdout; |
| 313 | 656 uart_on(); |
| 657 | |
| 312 | 658 fprintf_P(&mystdout, PSTR("hello %d\n"), 12); |
| 319 | 659 |
| 660 check_first_startup(); | |
| 661 | |
| 314 | 662 uart_off(); |
| 306 | 663 |
| 312 | 664 // turn off everything except timer2 |
| 314 | 665 //PRR = _BV(PRTWI) | _BV(PRTIM0) | _BV(PRTIM1) | _BV(PRSPI) | _BV(PRUSART0) | _BV(PRADC); |
| 666 | |
| 667 // for testing | |
| 668 uart_on(); | |
| 669 | |
| 318 | 670 sei(); |
| 314 | 671 |
| 307 | 672 // set up counter2. |
| 673 // COM21 COM20 Set OC2 on Compare Match (p116) | |
| 674 // WGM21 Clear counter on compare | |
| 320 | 675 //TCCR2A = _BV(COM2A1) | _BV(COM2A0) | _BV(WGM21); |
| 676 // toggle on match | |
| 677 TCCR2A = _BV(COM2A0); | |
| 307 | 678 // CS22 CS21 CS20 clk/1024 |
| 308 | 679 TCCR2B = _BV(CS22) | _BV(CS21) | _BV(CS20); |
| 307 | 680 // set async mode |
| 681 ASSR |= _BV(AS2); | |
| 320 | 682 TCNT2 = 0; |
| 683 OCR2A = SLEEP_COMPARE; | |
| 314 | 684 // interrupt |
| 685 TIMSK2 = _BV(OCIE2A); | |
| 306 | 686 |
| 312 | 687 for (;;) |
| 688 { | |
| 318 | 689 do_comms(); |
| 312 | 690 } |
| 318 | 691 |
| 306 | 692 for(;;){ |
| 693 /* insert your main loop code here */ | |
| 307 | 694 if (need_measurement) |
| 695 { | |
| 320 | 696 need_measurement = 0; |
| 307 | 697 do_measurement(); |
| 320 | 698 // testing |
| 699 cmd_fetch(); | |
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700 continue; |
| 307 | 701 } |
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702 |
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703 if (need_comms) |
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704 { |
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705 do_comms(); |
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706 continue; |
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707 } |
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708 |
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709 deep_sleep(); |
| 315 | 710 blink(); |
| 316 | 711 printf("."); |
| 306 | 712 } |
| 318 | 713 |
| 306 | 714 return 0; /* never reached */ |
| 715 } |